Arne Duncan, US Secretary of Education addresses a panel while visiting Charles H. Wright Academy of Arts and Sciences in Detroit, on Thursday, Sept., 8, 2011.

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The nation's education leader says other states need to follow Michigan's example in raising expectations for passing state exams.

"All states need to assess the quality of their assessments, just as Michigan has, to ensure they are providing an accurate picture of students' college and career readiness," U.S. Secretary Arne Duncan said in a statement today.